How long do you think it'll take for a girl to cool off?

So after me and my girlfriend broke up I said some harsh things about her. I tweeted it's funny how some people can twist a heart for days and then rip it out but only when you tell them to. I can tell her best friend is annoyed with me and her and her best friend usually have the same mind set. I've seen her a couple times since the break up and she ignored me completely. How long do you guys think it's going to take for her to cool off?